function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Kirkaldy, George Willis', 1],
    ['Kment, Petr & Carapezza, Attilio', 1],
    ['Nakthong, La-Au & Vitheepradit, Akekawat & Sites, Robert W.', 2],
    ['Subramanian, K. A. & Basu, Srimoyee & Zettel, Herbert', 2],
    ['Zettel, Herbert & Duc, Tran Anh', 1],
    ['Zettel, Herbert & Tran, A. D.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=8)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);